Tianjin small flow mass flowmeter | What is the working principle of mass flowmeter

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1. Working principle of mass flowmeter

The mass flowmeter directly measures the mass of the fluid based on the principle of Coriolis force, and calculates the accurate mass flow value by detecting the phase difference or frequency change generated by the U-shaped tube under the action of fluid flow. The core principle of a Coriolis Mass Flowmeter is the Coriolis effect. When a fluid flows through a vibrating measuring tube, a Coriolis force proportional to the mass flow rate is generated. This force will cause the measuring tube to twist, and the mass flow rate of the fluid can be directly calculated by detecting this twisting amount (usually manifested as the phase difference or time difference between the inlet and outlet), without the need for pressure and temperature compensation like a volumetric flow meter.

2. Key components and workflow drive coils: generate alternating electromagnetic force to continuously vibrate the measuring tube at its natural frequency. Measuring tube: usually U-shaped, Ω - shaped, or straight tube shaped, it is the channel and core sensitive component of the fluid. Sensor: located on the inlet and outlet sides of the measuring tube, used to detect the phase change of vibration on both sides. Transmitter: Receive the signal from the sensor, calculate the phase difference (Δ t) and convert it into mass flow rate and density values

3. The main technical types are mainly divided into two types based on the shape and vibration mode of the measuring tube: straight tube type: low pressure loss, less prone to scaling, but relatively low sensitivity, commonly used for high flow measurement. Bend type (such as U-shaped pipe): high sensitivity and measurement accuracy, it is cur

rently the most mainstream type, but the pressure loss is relatively large. Main advantages and limitations: direct measurement of mass flow rate, extremely high accuracy (up to ± 0.1%); Can simultaneously measure fluid density and temperature; Measurement is not affected by changes in fluid properties (viscosity, density, pressure, temperature). Limitations: High initial cost; High requirements for installation (need to avoid leakage, external vibration, and stress); For small-diameter instruments, the pressure loss is relatively large. Due to its high precision and direct measurement of quality, it is widely used in industries that require accurate measurement, trade settlement, and process control, such as petrochemicals, food and pharmaceuticals, semiconductor manufacturing, and energy metering.

2. What are the parameters of a mass flowmeter and how to adjust them?

The main parameters of a mass flowmeter include measurement range, accuracy, repeatability, linearity, and response time.

. The following is a detailed introduction to these parameters and how to adjust the parameters of the mass flowmeter:

1. The main parameters of the mass flowmeter are the measurement range, which refers to the minimum and maximum values of the flow signal that the mass flowmeter can measure, depending on the size and technical characteristics of the flowmeter. Accuracy: Refers to the deviation between the measured result and the actual value, usually expressed as a percentage or decimal, and is influenced by various factors. Repeatability: The consistency of multiple measurement results under the same measurement conditions, expressed as standard deviation, reflects the stability and reliability of the measureme

Tianjin small flow mass flowmeter | What is the working principle of mass flowmeter

1. Working principle of mass flowmeter

2. What are the parameters of a mass flowmeter and how to adjust them?

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